If she has agreed to a .38 Special...start her off with it
The .38 Special is a great gun to start her out with if she has already committed to it. But, don't forget NOT all snub revolvers feel the same in the hand, or behave the same when fired. And, grips can make the world of difference in how they handle.
Start her out with light loads...reloads if you can find them. Build up to stouter loads. And, there is a difference between the type of recoil you get from light +P loads and 158 grain +P.
My girlfriend is 5' 4", very slight in frame, and weighs 104 lbs soaking wet. Strangely enough, she enjoys shooting my old Charter Arms Under Cover .38 Special. I have tried to talk her out of it...she keeps it at her place, now.
The compromise for now is to keep it loaded with 110 grain,
non +P, Federal Hydra-Shok JHP.
http://www.federalpremium.com/products/details/handgun.aspx?id=400 I know it is not the best thing out of a snub, but she is comfortable with it and can hit her mark shooting double-taps at 7 yards.
As for the
9mm revolver mentioned in an earlier post...
uuuummm NO. If a person can't handle the .38 Special out of a snub revolver...the 9mm out of a snub revolver will for sure turn him/her away. That opinion is based my own personal experience. Had one in the Taurus brand. Great gun. Performed well. But, in my subjective experience the recoil felt more snappy than any +P .38 Special. It was just below the line of a low-end .357 Magnum.